Six species belonging to five genera of Mysidae from the western Arabian Gulf are reported. These are Siriella brevicaudata Paulson, 1875, S. hanseni W. M. Tattersall, 1922, Gastrosaccus kempi W. M. Tattersall, 1922, Haplostylus parerythraeus (Nouvel, 1944), Indomysis annandalei W. M. Tattersall, 1914, and Heteromysis proxima W. M. Tattersall, 1922. All the species are first records for the Arabian Gulf region. Indomysis annandalei and H. proxima are only the second records for the species. Both were previously described from India.